Use different colours on tasks on task page

[sylvihuynh]

There should be three different designs for the tasks based on the status of the assessment. These are:

• Finished
• Current
• Remaining

These boxes should route to the correct tasks.

[amalieeh]

Also

• [ ] Create functionality for saving and displaying which tasks have been assessed/are remaining. The tasks that have been assessed should be temporary unclickable while as the remaining tasks are clickable and up for assessment.